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7.3-11 - Problems 13-11 through 13-13 An element in pirate...

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Unformatted text preview: Problems 13-11 through 13-13 An element in pirate stress (see figure) is subjected to stresses or o' , and fly. {a} Determine the principal stresses and short".r them on a sketch of o T properly.r oriented element. _, {h} Determine flle maximum shear stresses and associated nouns] 71? stresses and shot.»r them on a sketch of o properly-r oriented element. 1 t7; '1— 0 —l- I 1— [late tor 13-11 orI = 3500 psi, o':F = 1120 psi, 1'}? = —1200 psi vi Sflllttlfln 13-11 Plane stress HI = 3500 psi G1? = 1120 psi 1'1? = —1100 psi Therefore, 0'1 = 4000 psi and Hm = —22.62° {a} PRJNCIFAL smsssss or: = 620 psi and Hrs = 6133“ 21' taoiflp = ”J" = —1.oos4 IT; —fl'}. 23F = —45.24° and HF = —22.fil° 23!, = 134.70” and HF = 15133“ tr, + If}. U" — {I}. + 2 2 For 20!, = —45.24°: :le = 41000 psi For My = 134.115”: 1'le = 620 psi “"1. = posit}l + TH, sin 20 ...
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